CN101158725A - Temperature adjustable negative refraction device based on dielectric grain and metal lines and preparation method - Google Patents
Temperature adjustable negative refraction device based on dielectric grain and metal lines and preparation method Download PDFInfo
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- 239000002184 metal Substances 0.000 title claims abstract description 89
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- 239000000919 ceramic Substances 0.000 claims abstract description 103
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- 230000001939 inductive effect Effects 0.000 claims description 16
- 238000007766 curtain coating Methods 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000003960 organic solvent Substances 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
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- 230000035699 permeability Effects 0.000 abstract description 12
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- 229910052454 barium strontium titanate Inorganic materials 0.000 description 22
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 10
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Abstract
The invention discloses a negative refraction device with adjustable temperature which is based on dielectric particle and metal wire and a preparation method thereof. The device consists of a plurality of tiered PTPE template blocks, dielectric ceramic particles, metal wires and an attemperating apparatus. Each block of PTPE template is provided with an array of round holes, the dielectric ceramic particles and the metal wires are alternately embedded into the round holes to form an array of dielectric ceramic particles and an array of metal wires. The device can ensure that the electromagnetic wave to show isotropic negative magnetic conductivity when the magnetic resonance occurs during a certain frequency band, as well as a negative permittivity is showed simultaneously, thus realizing the negative index of refraction. The controllability of the negative permeability is achieved by temperature through the regulating property for the permittivity of dielectric ceramic particles thereof, and consequently the controllability of the negative index of refraction is achieved. The invention attaches the intelligent capability to the left-handed material, and the invention can be applicable to photoconducting devices such as an adjustable band-pass filter, a photonic crystal slab with adjustable negative index of refraction, and an adjustable hidden device, as well as to the communication field.
Description
Technical field
The present invention relates to a kind of negative refraction device, particularly a kind of temperature-tunable negative refraction device based on dielectric ceramics particle and metal wire.
Background technology
(Left-handed metamaterials, research LHMs) is forward position and the hot issue in the research fields such as current physics, materialogy and electromagnetics to left-handed materials, has a wide range of applications.Simultaneously less than zero, the typical structure of realizing LHMs usually is the composite structure of metal openings resonant ring (SRRs) and metal wire in a certain frequency range for the effective dielectric constant of LHMs and magnetic permeability.The SRRs array of periodic arrangement is in its resonance frequency omega
0The place has very strong magnetic resonance, and magnetic permeability is being a bit larger tham its resonance frequency place for negative simultaneously.And the Metallic rod array of periodic arrangement shows the microwave plasma behavior, less than its plasma frequency ω
pThe broad frequency range in have negative specific inductive capacity.
Usually, the magnetic response of metal construction unit is mainly determined by its equivalent capacity and equivalent inductance, promptly is subjected to the influence of its physical dimension, environment specific inductive capacity and magnetic permeability.Structural unit by the design different geometrical size is realized the magnetic resonance of required frequency range with the medium substrate of selecting differing dielectric constant for use, thereby realizes negative magnetic permeability.But this method is a kind of passive type design, has a lot of shortcomings.Once design and processing, its magnetic response frequency and left hand frequency range are just immutable, have limited its practical ranges as the structural unit of LHMs.Thereby, design a kind of dynamic-tuning LHMs and just seem particularly important.
In addition, be anisotropic based on the electromagnetic response characteristic of the LHMs of metal SRRs structural unit, promptly only on certain direction, have negative electromagnetic parameter, limited its range of application greatly.Realize that infrared and research visible light wave range LHMs has obtained gratifying progress although utilize the metal construction unit, but, utilize existing micro-processing technology to prepare comparatively difficulty and costing an arm and a leg of micro nano structure unit because the geometric configuration of metal construction unit is complicated usually.
Summary of the invention
The objective of the invention is to utilize the thermally sensitive dielectric response behavior of dielectric ceramics particle, a kind of temperature-tunable negative refraction device based on dielectric ceramics particle and metal wire and preparation method thereof is provided.
Technical scheme of the present invention is as follows:
A kind of temperature adjustable negative refraction device based on dielectric grain and metal wire is characterized in that: described device is made up of the stacked teflon template of polylith, dielectric ceramics particle, metal wire and attemperating unit; Every teflon template is provided with array of circular apertures, and described dielectric ceramics particle and metal wire alternately embed and form dielectric ceramics array of particles and array of metal lines in the circular hole; This devices use temperature realizes the Modulatory character of described negative refraction to the control characteristic of dielectric ceramics particle dielectric constant.
The specific inductive capacity of dielectric ceramics particle of the present invention is 800～2000.Array of circular apertures on the described teflon template is square profile and grating constant is 1.5～3.0mm.Dielectric cubic block or diameter that the described dielectric ceramics particle employing length of side is 0.6～1.8mm are the dielectric sphere of 0.8～2.0 mm.Described metal wire is that copper cash and its diameter are 0.2～0.6mm, and length is 1.5～3.0mm.
The present invention also provides a kind of preparation method of the temperature adjustable negative refraction device based on dielectric grain and metal wire, and this method comprises the steps:
1) utilize ceramic size curtain coating technology, with dielectric powder and MgO powder by mass percentage concentration 0～20% mix and be made into slurry and carry out curtain coating with organic solvent, obtain the cast sheet of different-thickness;
2) cast sheet to be slit into the length of side be the cubic block green compact of 0.8～2.3mm and carry out binder removal at 300～500 ℃, at last 1300～1500 ℃ of sintering 3～6 hours, obtain the length of side and be the dielectric ceramics cubic block of 0.6～1.8mm or it is worn into the dielectric ceramics ball that diameter is 0.8～2.0mm;
3) prepare array of circular apertures on the thick polyfluortetraethylene plate of 1.5～3.0mm, circular hole is square profile and grating constant is 1.5～3.0mm; Ceramic cubic block (or Ceramic Balls) and metal wire alternately are embedded in the circular hole of teflon template, make the polyfluortetraethylene plate that is embedded with ceramic cubic block and array of metal lines;
4) the polyfluortetraethylene plate circular hole aligning that will be embedded with ceramic particle and metal wire again carries out stacked bonding, makes the negative refraction sample;
5) above-mentioned negative refraction sample is placed among the temperature regulating device,, obtains temperature adjustable negative refraction device based on dielectric ceramics particle and metal wire by regulating the specific inductive capacity that temperature variation is regulated the dielectric ceramics particle.
In the said method, described dielectric ceramic powder adopts Ba
xSr
1-xTiO
3Powder, wherein x is 0.4～0.6.
The present invention has the following advantages and the high-lighting effect: the present invention utilizes the dielectric property of dielectric ceramics particle to realize the tunable negative refraction with the behavior of temperature scalable.This device can make electromagnetic wave show the isotropy negative magnetoconductivity at a certain frequency range generation magnetic resonance, also shows negative permittivity simultaneously, thereby realizes negative refractive index.Utilize temperature that the control characteristic of dielectric ceramics particle dielectric constant is realized the Modulatory character of its negative magnetoconductivity, thereby realize the scalable of negative index.The present invention has given intelligent characteristic for left-handed materials, and will be applied to photoelectric device and communication fields such as adjustable flat-plate lens imaging, the stealthy device of wideband section.
Description of drawings
Fig. 1 is based on the temperature adjustable negative refraction device synoptic diagram of dielectric ceramics particle and metal wire.
Fig. 2 barium strontium titanate (Ba
0.5Sr
0.5TiO
3) variation characteristic of dielectric constant with temperature of dielectric ceramics.
Fig. 3 is based on the temperature-tunable microwave transmission curve of the negative refraction device of dielectric ceramics particle (length of side is 1.0mm) and copper cash (diameter is 0.2mm).
Fig. 4 is based on the dispersion of refractive index curve of the negative refraction device of dielectric ceramics particle (length of side is 1.0mm) and copper cash (diameter is 0.2mm).
Fig. 5 is based on the temperature-tunable microwave transmission curve of the negative refraction device of dielectric ceramics particle (length of side is 0.8mm) and copper cash (diameter is 0.2mm).
Among the figure: 1-dielectric ceramics particle; The 2-metal wire; The 3-polyfluortetraethylene plate; The 4-circular hole; The 5-attemperating unit; The 6-incident electromagnetic wave; 7-outgoing electromagnetic wave.
Embodiment
Fig. 1 is the structural representation of the temperature adjustable negative refraction device based on dielectric ceramics particle and metal wire provided by the invention, and this device is made up of the stacked polyfluortetraethylene plate 3 of polylith, dielectric ceramics particle 1, metal wire 2 and attemperating unit 5; Every teflon template is provided with array of circular apertures 4, and described dielectric ceramics particle and metal wire alternately embed in the circular hole; This devices use temperature realizes the Modulatory character of its negative magnetoconductivity to the control characteristic of dielectric ceramics particle dielectric constant, thereby realizes the temperature scalable of negative index.
Working mechanism of the present invention is as follows:
The present invention is a kind of temperature adjustable negative refraction device based on dielectric ceramics particle and metal wire, and the dielectric constant with temperature that its core is the dielectric ceramics particle changes and changes, thereby its negative index can be by temperature adjusting.
Lewin has utilized the theoretical and electromagnetic scattering theoretical research of active medium and has been dispersed in the another kind of continuous medium and the electromagnetic response behavior of the complex media that forms by loss-free dielectric/magnetic particle ball, has drawn the Effective permeability theoretical expression of complex media:
Wherein, ε
pAnd μ
pBe respectively the relative dielectric constant and the magnetic permeability of particle ball, ε
hAnd μ
hBe respectively the relative dielectric constant and the magnetic permeability of continuous medium, r is the radius of a ball, and s is a grating constant, k
0Wave vector for free space.The applicable elements of active medium theory is ε
p＞＞ε
h, thereby above various just meaningful must satisfy long wavelength's approximate condition the time.When θ got some particular value, F (θ) can become negative value, thereby caused Effective permeability less than zero.Thereby, be negative by selecting suitable material parameter (size of ball, specific inductive capacity and magnetic permeability etc.) just can make its magnetic permeability in a certain frequency range.The generation of this negative magnetoconductivity is that this displacement current can be equivalent to a magnetic dipole, thereby produces due to the very strong magnetic resonance because electromagnetic field has been induced annular displacement current in the dielectric ceramics particle.This magnetic resonance is corresponding to the 1st grade of Mie resonance mode.
Adopt array of metal lines to realize the specific inductive capacity of bearing.With dielectric ceramics particle and the compound negative refraction device that just made of metal wire.Because the specific inductive capacity of dielectric ceramics particle changes with the variation of extra electric field, temperature, stress etc., thereby can regulate its dielectric property, realize the temperature adjustable characteristic of negative magnetoconductivity, and then realize the control characteristic of negative refraction by changing temperature.
At first prepare the dielectric ceramics particle.Barium strontium titanate (Ba
xSr
1-xTiO
3(BST), x=0.4～0.6) be a kind of ferroelectric material, have high micro-wave dielectric constant and low-loss, have the dielectric adjustable characteristic simultaneously again.Adopt synthesis by solid state reaction to prepare the BST powder.This method adopts highly purified BaCO
3, SrCO
3And TiO
2Be raw material, react with following equation and make the BST powder.
x?BaCO
3+(1-x)SrCO
3+TiO
2＝Ba
xSr
1-xTiO
3+CO
2↑
With BaCO
3, SrCO
3And TiO
2Mix by above proportioning, through ball milling, dry, sieve after, 1100～1300 ℃ of calcinings 3～6 hours, and then ball milling, that oven dry makes the BST powder was stand-by.
Utilize ceramic size curtain coating technology, the BST powder mixed and be made into slurry with organic solvent with a certain amount of MgO powder (mass percent concentration of MgO powder is 0～20%) carry out curtain coating, obtain the cast sheet of different-thickness, then cast sheet is cut into the length of side and be the cubic block green compact of 0.8～2.3mm and carry out binder removal at 300～500 ℃, at last 1300～1500 ℃ of sintering 3～6 hours, obtaining the length of side and be the dielectric ceramics cubic block 1 of 0.6～1.8mm densification or ball milling, to make diameter be 0.8～2.0mm dielectric ceramics ball 1.
With diameter is that the metal wire of 0.2～0.6mm cuts into the metal wire sections 2 that length is 1.5～3.0mm.
Be to prepare circular hole 4 arrays on the polyfluortetraethylene plate 3 of 1.5～3.0mm at thickness, the circular hole spacing is 1.5～3.0mm and is square profile, thereby obtains the teflon template.Ceramic particle and metal wire alternately are embedded in the circular hole of teflon template, make the polyfluortetraethylene plate that is embedded with ceramic cubic block (or ball) and array of metal lines.The polyfluortetraethylene plate circular hole aligning that is embedded with ceramic particle and metal wire is carried out stacked bonding, make the negative refraction sample.Above-mentioned negative refraction sample is placed among the temperature regulating device,, obtains temperature adjustable negative refraction material sample based on dielectric ceramics particle and metal wire by regulating the specific inductive capacity that temperature variation is regulated the dielectric ceramics particle.
Above-mentioned negative refractive index material sample is placed into the temperature adjustable negative refraction device that obtains in the temperature regulating device 5 based on dielectric ceramics particle and metal wire.The temperature-controlled precision of this temperature regulating device should reach ± and 0.1 ℃.Thereby realize the specific inductive capacity of temperature variation adjusting dielectric ceramics particle by regulating temperature regulating device, realize temperature-tunable negative magnetic permeability.Incident electromagnetic wave 6 is injected from the bottom of device, and outgoing electromagnetic wave 7 is penetrated by the top.
The performance of implementation procedure of the present invention and material is by embodiment and description of drawings:
Embodiment 1:
Adopt synthesis by solid state reaction to prepare Ba
0.5Sr
0.5TiO
3(BST) powder.This method adopts highly purified BaCO
3, SrCO
3And TiO
2Be raw material, react with following equation and make Ba
0.5Sr
0.5TiO
3Powder.
0.5?BaCO
3+0.5?SrCO
3+TiO
2＝Ba
0.5Sr
0.5TiO
3+CO
2↑
With BaCO
3, SrCO
3And TiO
2Mix by above proportioning, through ball milling, dry, sieve after, 1150 ℃ of calcinings 3 hours, and then ball milling, that oven dry makes the BST powder was stand-by.
Utilize ceramic size curtain coating technology, above made BST powder is made into slurry carries out curtain coating, obtaining thickness is the BST cast sheet of 1.25mm, then cast sheet is cut into the cubic block green compact that the length of side is 1.25mm.Again the cubic block green compact are carried out binder removal at 400 ℃, at last 1400 ℃ of sintering 3 hours, obtaining the length of side is the BST pottery cubic block of 1.00mm.Its temperature dielectric property measurement result as shown in Figure 2, the relative dielectric constant during 25 ℃ of visible room temperatures is 1600.
With diameter is that the metal wire of 0.20mm cuts into the metal wire sections that length is 2.0mm.
Utilize numerically-controlled machine to get out diameter for 1.42mm and be into the array of circular apertures that tetragonal distributes on the polyfluortetraethylene plate of thickness for 2.00mm, its grating constant is 2.00mm.And then get out the circular hole that diameter is 0.2mm, thereby obtain the teflon template that two kinds of hole periodic intervals are arranged in the center on each limit of tetragonal.Be template then with the polyfluortetraethylene plate, ceramic cubic block is embedded in the circular hole that diameter is 1.42mm, metal wire is embedded in the circular hole that diameter is 0.2mm, make the polyfluortetraethylene plate that is embedded with ceramic cubic block and array of metal lines.The polyfluortetraethylene plate circular hole aligning that will be embedded with ceramic particle and metal wire again carries out stacked bonding, makes the negative refraction sample.Above-mentioned negative refraction sample is placed among the temperature regulating device,, obtains temperature adjustable negative refraction material sample based on dielectric ceramics particle and metal wire by regulating the specific inductive capacity that temperature variation is regulated the dielectric ceramics particle.Above-mentioned negative refractive index material sample is placed into the temperature adjustable negative refraction device that obtains in the temperature regulating device based on dielectric ceramics particle and metal wire.Its temperature-tunable microwave transmission curve as shown in Figure 3.As seen from Figure 3, when temperature changed in 25 ℃～80 ℃ scopes, its corresponding left-hand transmission peak had moved to 9.18GHz by 6.14GHz to high frequency.Fig. 4 has provided the dispersion of refractive index curve when temperature is 20 ℃, as seen this device is at its place, left-hand transmission peak, 4.94 have negative refractive index in the～6.52GHz frequency range, and the negative index frequency range moves to high frequency with the rising of temperature, promptly with the temperature scalable.
Embodiment 2:
With embodiment one, utilize synthesis by solid state reaction to prepare Ba
0.5Sr
0.5TiO
3(BST) powder, and utilize ceramic size curtain coating technology to make the BST pottery cubic block that the length of side is 0.8mm, its temperature dielectric property measurement result as shown in Figure 2, the relative dielectric constant during 25 ℃ of visible room temperatures is 1600.
With diameter is that the metal wire of 0.20mm cuts into the metal wire sections that length is 1.5mm.
Utilize numerically-controlled machine to get out diameter for 1.13mm and be into the array of circular apertures that tetragonal distributes on the polyfluortetraethylene plate of thickness for 1.5mm, its grating constant is 1.5mm.And then get out the circular hole that diameter is 0.2mm, thereby obtain the teflon template that two kinds of hole periodic intervals are arranged in the center on each limit of tetragonal.Be template then with the polyfluortetraethylene plate, ceramic cubic block is embedded in the circular hole that diameter is 1.13mm, metal wire is embedded in the circular hole that diameter is 0.2mm, make the polyfluortetraethylene plate that is embedded with ceramic cubic block and array of metal lines.The polyfluortetraethylene plate circular hole aligning that will be embedded with ceramic particle and metal wire again carries out stacked bonding, makes the negative refraction sample.Above-mentioned negative refraction sample is placed among the temperature regulating device,, obtains temperature adjustable negative refraction material sample based on dielectric ceramics particle and metal wire by regulating the specific inductive capacity that temperature variation is regulated the dielectric ceramics particle.Above-mentioned negative refractive index material sample is placed into the temperature adjustable negative refraction device that obtains in the temperature regulating device based on dielectric ceramics particle and metal wire.Its temperature-tunable microwave transmission curve as shown in Figure 5.As seen from Figure 5, when temperature changed in 25 ℃～80 ℃ scopes, its corresponding left-hand transmission peak had moved to 11.20GHz by 7.60GHz to high frequency.
Embodiment 3:
With embodiment one, utilize synthesis by solid state reaction to prepare Ba
0.5Sr
0.5TiO
3(BST) powder mixes the BST powder and mixes with organic solvent being made into slurry and carrying out curtain coating with the 5wt%MgO powder, making the length of side is the BST pottery cubic block of 1.6mm, and the relative dielectric constant during 25 ℃ of room temperatures is 1200.
With diameter is that the metal wire of 0.40mm cuts into the metal wire sections that length is 3.0mm.
Utilize numerically-controlled machine to get out diameter for 2.3mm and be into the array of circular apertures that tetragonal distributes on the polyfluortetraethylene plate of thickness for 3.0mm, its grating constant is 3.0mm.And then get out the circular hole that diameter is 0.4mm, thereby obtain the teflon template that two kinds of hole periodic intervals are arranged in the center on each limit of tetragonal.Be template then with the polyfluortetraethylene plate, ceramic cubic block is embedded in the circular hole that diameter is 2.3mm, metal wire is embedded in the circular hole that diameter is 0.4mm, make the polyfluortetraethylene plate that is embedded with ceramic cubic block and array of metal lines.The polyfluortetraethylene plate circular hole aligning that will be embedded with ceramic particle and metal wire again carries out stacked bonding, makes the negative refraction sample.Above-mentioned negative refraction sample is placed among the temperature regulating device,, obtains temperature adjustable negative refraction material sample based on dielectric ceramics particle and metal wire by regulating the specific inductive capacity that temperature variation is regulated the dielectric ceramics particle.Above-mentioned negative refractive index material sample is placed into the temperature adjustable negative refraction device that obtains in the temperature regulating device based on dielectric ceramics particle and metal wire.
Embodiment 4:
With embodiment one, utilize synthesis by solid state reaction to prepare Ba
0.6Sr
0.4TiO
3(BST) powder, the BST powder mixed with the 20wt%MgO powder and mix and be made into slurry and carry out curtain coating with organic solvent, make the length of side and be the BST pottery cubic block of 3mm, then it is worn into the Ceramic Balls that diameter is 1.5mm, the relative dielectric constant during 25 ℃ of room temperatures is 800.
With diameter is that the metal wire of 0.60mm cuts into the metal wire sections that length is 3.0mm.
Utilize numerically-controlled machine to get out diameter for 1.5mm and be into the array of circular apertures that tetragonal distributes on the polyfluortetraethylene plate of thickness for 3.0mm, its grating constant is 3.0mm.And then get out the circular hole that diameter is 0.6mm, thereby obtain the teflon template that two kinds of hole periodic intervals are arranged in the center on each limit of tetragonal.Be template then with the polyfluortetraethylene plate, ceramic cubic block is embedded in the circular hole that diameter is 1.5mm, metal wire is embedded in the circular hole that diameter is 0.6mm, make the polyfluortetraethylene plate that is embedded with ceramic cubic block and array of metal lines.The polyfluortetraethylene plate circular hole aligning that will be embedded with ceramic particle and metal wire again carries out stacked bonding, makes the negative refraction sample.Above-mentioned negative refraction sample is placed among the temperature regulating device,, obtains temperature adjustable negative refraction material sample based on dielectric ceramics particle and metal wire by regulating the specific inductive capacity that temperature variation is regulated the dielectric ceramics particle.Above-mentioned negative refractive index material sample is placed into the temperature adjustable negative refraction device that obtains in the temperature regulating device based on dielectric ceramics particle and metal wire.
Embodiment 5:
With embodiment one, utilize synthesis by solid state reaction to prepare Ba
0.4Sr
0.6TiO
3(BST) powder, and utilize ceramic size curtain coating technology to make the length of side for the BST of 3mm pottery cubic block is worn into it Ceramic Balls that diameter is 0.8mm then, and the relative dielectric constant during 25 ℃ of room temperatures is 1600.
With diameter is that the metal wire of 0.20mm cuts into the metal wire sections that length is 1.5mm.
Utilize numerically-controlled machine to get out diameter for 0.8mm and be into the array of circular apertures that tetragonal distributes on the polyfluortetraethylene plate of thickness for 1.5mm, its grating constant is 1.5mm.And then get out the circular hole that diameter is 0.2mm, thereby obtain the teflon template that two kinds of hole periodic intervals are arranged in the center on each limit of tetragonal.Be template then with the polyfluortetraethylene plate, ceramic cubic block is embedded in the circular hole that diameter is 0.8mm, metal wire is embedded in the circular hole that diameter is 0.2mm, make the polyfluortetraethylene plate that is embedded with ceramic cubic block and array of metal lines.The polyfluortetraethylene plate circular hole aligning that will be embedded with ceramic particle and metal wire again carries out stacked bonding, makes the negative refraction sample.Above-mentioned negative refraction sample is placed among the temperature regulating device,, obtains temperature adjustable negative refraction material sample based on dielectric ceramics particle and metal wire by regulating the specific inductive capacity that temperature variation is regulated the dielectric ceramics particle.Above-mentioned negative refractive index material sample is placed into the temperature adjustable negative refraction device that obtains in the temperature regulating device based on dielectric ceramics particle and metal wire.
Claims (7)
1. temperature adjustable negative refraction device based on dielectric grain and metal wire, it is characterized in that: described device is made up of the stacked teflon template of polylith, dielectric ceramics particle, metal wire and attemperating unit; Every teflon template is provided with array of circular apertures, and described dielectric ceramics particle and metal wire alternately embed and form dielectric ceramics array of particles and array of metal lines in the circular hole; This devices use temperature realizes the Modulatory character of described negative refraction to the control characteristic of dielectric ceramics particle dielectric constant.
2. according to the described temperature adjustable negative refraction device based on dielectric grain and metal wire of claim 1, it is characterized in that: the specific inductive capacity of described dielectric ceramics particle is 800～2000.
3. according to the described temperature adjustable negative refraction device based on dielectric grain and metal wire of claim 1, it is characterized in that: the array of circular apertures on the described teflon template is square profile and grating constant is 1.5～3.0mm.
4. according to the described temperature adjustable negative refraction device based on dielectric grain and metal wire of claim 1, it is characterized in that: dielectric cubic block or diameter that the described dielectric ceramics particle employing length of side is 0.6～1.8mm are the dielectric sphere of 0.8～2.0mm.
5. according to the described temperature adjustable negative refraction device based on dielectric grain and metal wire of claim 1, it is characterized in that: described metal wire is that copper cash and its diameter are 0.2～0.6mm, and length is 1.5～3.0mm.
6. the preparation method based on the temperature adjustable negative refraction device of dielectric grain and metal wire is characterized in that this method comprises the steps:
1) utilize ceramic size curtain coating technology, with dielectric ceramic powder and MgO powder by mass percentage concentration 0～20% mix and be made into slurry and carry out curtain coating with organic solvent, obtain the cast sheet of different-thickness;
2) cast sheet to be slit into the length of side be the cubic block green compact of 0.8～2.3mm and carry out binder removal at 300～500 ℃, at last 1300～1500 ℃ of sintering 3～6 hours, obtain the length of side and be the dielectric ceramics cubic block of 0.6～1.8mm or it is worn into the dielectric ceramics ball that diameter is 0.8～2.0mm;
3) prepare array of circular apertures on the thick polyfluortetraethylene plate of 1.5～3.0mm, circular hole is square profile and grating constant is 1.5～3.0mm; Ceramic cubic block or Ceramic Balls and metal wire alternately are embedded in the circular hole of teflon template, make the polyfluortetraethylene plate that is embedded with ceramic cubic block and array of metal lines;
4) the polyfluortetraethylene plate circular hole aligning that will be embedded with ceramic particle and metal wire again carries out stacked bonding, makes the negative refraction sample;
5) above-mentioned negative refraction sample is placed among the temperature regulating device,, obtains temperature adjustable negative refraction device based on dielectric ceramics particle and metal wire by regulating the specific inductive capacity that temperature variation is regulated the dielectric ceramics particle.
7. according to the preparation method of the described temperature adjustable negative refraction device based on dielectric grain and metal wire of claim 6, it is characterized in that: described dielectric ceramic powder adopts Ba
xSr
1-xTiO
3Powder, wherein x is 0.4～0.6.
Priority Applications (1)
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Cited By (8)
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| CN102033342A (en) * | 2010-12-14 | 2011-04-27 | 西北工业大学 | Liquid crystal based broadband negative refractive index device with adjustable temperature and production method thereof |
| CN102426298A (en) * | 2011-06-17 | 2012-04-25 | 上海华力微电子有限公司 | Method for monitoring film dielectric constant stability by using refractive index |
| CN101459270B (en) * | 2008-12-12 | 2012-07-25 | 清华大学 | Tunable full medium multi-frequency band isotrope zero-refraction flat-plate lens and preparation thereof |
| CN101494310B (en) * | 2008-11-27 | 2012-08-29 | 电子科技大学 | Tunable microwave material with negative refractive index |
| CN104485502A (en) * | 2014-12-31 | 2015-04-01 | 清华大学 | Metamaterial harmonic oscillator based on dielectric resonator and application of metamaterial harmonic oscillator |
| CN106461829A (en) * | 2014-06-09 | 2017-02-22 | 索尼公司 | Optical filter, solid-state imaging apparatus, and electronic device |
| CN107046179A (en) * | 2016-09-18 | 2017-08-15 | 北京邮电大学 | A kind of super surface of adjustable dielectric |
| CN109901363A (en) * | 2017-12-11 | 2019-06-18 | 中国科学院光电技术研究所 | Negative refraction imaging and photo-etching method and equipment |
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- 2007-11-23 CN CNB2007101779709A patent/CN100507606C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101494310B (en) * | 2008-11-27 | 2012-08-29 | 电子科技大学 | Tunable microwave material with negative refractive index |
| CN101459270B (en) * | 2008-12-12 | 2012-07-25 | 清华大学 | Tunable full medium multi-frequency band isotrope zero-refraction flat-plate lens and preparation thereof |
| CN102033342A (en) * | 2010-12-14 | 2011-04-27 | 西北工业大学 | Liquid crystal based broadband negative refractive index device with adjustable temperature and production method thereof |
| CN102426298A (en) * | 2011-06-17 | 2012-04-25 | 上海华力微电子有限公司 | Method for monitoring film dielectric constant stability by using refractive index |
| CN102426298B (en) * | 2011-06-17 | 2014-02-05 | 上海华力微电子有限公司 | Method for monitoring film dielectric constant stability by using refractive index |
| CN106461829A (en) * | 2014-06-09 | 2017-02-22 | 索尼公司 | Optical filter, solid-state imaging apparatus, and electronic device |
| CN106461829B (en) * | 2014-06-09 | 2019-10-29 | 索尼半导体解决方案公司 | Optical filter, solid state image pickup device and electronic equipment |
| CN104485502A (en) * | 2014-12-31 | 2015-04-01 | 清华大学 | Metamaterial harmonic oscillator based on dielectric resonator and application of metamaterial harmonic oscillator |
| CN107046179A (en) * | 2016-09-18 | 2017-08-15 | 北京邮电大学 | A kind of super surface of adjustable dielectric |
| CN109901363A (en) * | 2017-12-11 | 2019-06-18 | 中国科学院光电技术研究所 | Negative refraction imaging and photo-etching method and equipment |
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| CN100507606C (en) | 2009-07-01 |
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